4NDK:
reference: Using molecular dynamics simulations as an aid in the prediction of domain swapping of computationally designed protein variants., Mou Y, Huang PS, Thomas LM, Mayo SL, J Mol Biol. 2015 Jun 20. pii: S0022-2836(15)00346-0. doi:, 10.1016/j.jmb.2015.06.006. PMID: 26101839

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).